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R. B. WILLIS.

Magazine Stove. I

Patented April 20, 1869.

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R. B. WILLIS, OF ROCHESTER, NEW YORK.

Letters Patent No. 89,260, dated April 20, 1869.

BASE-BURNING- STOVE.

The Schedule referred to in these Letters Patent and making part of thesame.

To all whom it may concern:

. Be it known that I, R. B. WILLIS, of the city of Rochester, in theState of New York, have invented a new and useful Stove; and I do herebydeclare that the following is a full, clear, and exact descriptionthereoffreference being had to the accompanying drawing, making part ofthis specification, in which- Figure l is a vertical secfion.

' Figure 2 is an inverted view of plate x, applied to the lower end ofhollow shaft b.

The nature of this invention is in providing baseburning stoves with adevice by which soft coal, and coal of small size, can be burned, andthe supply more easily regulated.

To enable others skilled in the art to make and use my invention, I willdescribe its construction and operation.

Across the centre of the top-opening of the supplycham'ber, a, of stovesof this class, I place a bridgetree, f, in the centre of which, anopening is provided; to receive the shaft b.

This shaft has, on its. upper end, a collar, 0, which is provided withholes, e, to receive a bar, to turn A. This collar sustains the shaft onthe bridge-tree f.

On this shaft I also fasten another collar, g, which operates againstthe under side of the bridge-tree f,

and prevents it from moving vertically.

This shaft 11 is hollow, to allow air to pass down to the fire, whichgives more oxygen to the burning mass, and causes more perfectcombustion.

The lower end of the shaft b is partially enclosed by a perforatedplate, as, shown in fig. 2, which arrests the flame, and the gas, thatmight escape through the hollow shaft, isburned. I

On the outside of the shaft b, I fasten a screw-plate,

h, which is in diameter nearly the same as the inside of thesupply-chamber.

This screw, or spiral plate, may either be made in one piece with theshaft b, or it may be made in sec-- tions, and fastened on it.

This screw sustains the fuel, and, by turning the shaft more or less, itfeeds any desired quantity of fuel.

The object of this invention is to produce a means by which soft coalcan be burned in base-burningstoves or other stoves.

' In the common stoves of this class, if soft coal is used, the heatwill swell the coal, and it will run into a mass, and will not readilyfall into the fire-pot when it is required. But by my device, the screw,or spiral plate h, being made to fit the supply-chamber, the flightsprevent the coal from getting into a solid mass, and, when it is desiredto replenish the fire, all that is necessary is to turn the spiral plateIt with the sun, by putting the bar into the holes in the collar 0, and

it will press the fuel downward, and give the supply required.

What I claim as my invention, and desire to secure by Letters Patent,is'- 1. The screw-plate h, when applied to the supplyohamber ofcoal-stoves, for the purpose set forth.

2. Thehollow-shaft b, with or Without the perforated plate x, incombination with the elevated supply-chamber of coal-stoves, when itconducts the cold airdownward centrally into the combustion-chamber, forthe purpose set forth.

R. B. WILLIS.

Witnesses:

0. FULTON. JAS. L. GAGE.

